Across Los Angeles, there are dozens of billboards blaming the apps Tinder and Grindr for spreading sexually transmitted infections and encouraging people to get tested. The folks at Tinder and Grindr are not pleased.

There's been no significant change in the prevalence of HIV infection among US adults, according to the latest estimates released in the Centers for Disease Control and Prevention's National Health StatisticsReports.

Everyone who has HIV should be immediately be put on antiretroviral triple therapy and everyone at risk of becoming infected should be offered protective doses of similar drugs, the World Health Organization said as it issued new HIV treatment and prevention guidelines.

Clinical practice rarely mirrors the screening recommendations developed by expert panels, and this week, colleagues explored that divide in a modeling study and concluded that, as practiced, the current recommendations are inefficient.

At the time of HIV testing, nearly one quarter of newly diagnosed HIV-positive gay and bisexual men in North Carolina did not report male sex partners, according to an analysis by the Centers for Disease Control and Prevention.